Advances In Root Canal System Of Adult Mandibular First Molars And Typical Endodontic Disease Report

Dental pulp and periapical disease is a common disease in the dentistry.Root canal therapy is currently the most effective and most commonly used treatment,it is through the mechanical preparation and the role of drugs to eliminate inflammation,control the infection,and then permanently filled and crown repair,so as to treat pulp disease,promote periapical lesions The more or prevent the occurrence of periapical lesions.The root of the success of root canal therapy is the full understanding of the root canal system.The root canal system is divided into two parts: the medullary cavity and the root canal.Mandibular first molar is the most common root canal treatment of permanent teeth,but also the root canal system is one of the more complex anatomical permanent teeth.Mandibular first molar common anatomical morphology for the medullary chamber was short cube,near the diameter> buccal diameter> medullary height,the bottom of the pulp can be seen 3 root canal,near the root canal was distributed to the buccal tongue,far Partial buccal or near.In all kinds of literature and case reports,the mandibular first molar root canal number of 1-7,1 root canal root canal in the central medullary cavity,the remaining cases are located in the middle or far,7 root canals were nearly 4 root canal,far from the root canal.Mandibular first molar can also occur bovine dental disease,common in the mandibular second molar C-shaped root canal also occurred in the mandibular first molar.Changes in root canal morphology and root canal changes can occur separately or simultaneously,together with the physiological and pathological changes of the root canal system,the anatomical morphology of the mandibular first molar root canal system is complicated,Anatomical morphology of the root canal system of a molar.Resin filling and root canal therapy are two commonly used clinical treatment.Resin filling commonly used in the treatment of dental caries,enamel hypoplasia,root canal treatment after the crown repair and so on.In recent years,with the resin materials and bonding system of continuous improvement,the front teeth of the resin aesthetic repair gradually popular,relative to the veneer and crown repair,it has a small amount of tooth grinding,treatment time and the number of small,the price Cheap and so on,and can meet the patient's functional and aesthetic requirements.Root canal therapy is often used to treat a variety of pulpitis and periapical periodontitis,is currently recognized as the most effective treatment.The increase in the number of root canal,alveolar bone destruction of severe chronic periapical perioditis for root canal therapy has brought some difficulty.CBCT,root canal surgery microscope can help find the root canal,to avoid the occurrence of omission,calcium hydroxide can promote the recovery of periapical tissue.The root tip has not yet developed completely permanent teeth,conventional root canal treatment is difficult to do dense filling.Apexification can be induced by the drug root tissue tissue formation of hard tissue,so that the root continues to develop and the apical hole shrink or closed to fill.In this paper,7 cases of root canal treatment of chronic periapical periodontitis with root canal variation and alveolar bone resorption were selected,2 cases of resin filled cases and 1 case of Apexification were reported.